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SUMMARY:DEM modelling of wave-induced floe-floe (and floe-structure) colli
 sions - Agnieszka Herman (University of Gdansk)
DTSTART:20171110T133000Z
DTEND:20171110T143000Z
UID:TALK94843@talks.cam.ac.uk
CONTACT:INI IT
DESCRIPTION:In the marginal ice zone (MIZ)\, waves entering from the open 
 ocean often induce collisions between neighboring ice floes. Due to limite
 d observational data\, it is not known to what degree wave-induced collisi
 ons contribute to the stress within the ice and to the dissipation of wave
  energy in MIZ.  In this paper\, wave-induced collisions between ice floes
  are analyzed with a numerical\, discrete-element model. The model simulat
 es surge motion of an ensemble of ice floes on a prescribed wave field. It
  is shown that the collision pattern depends on ice concentration\, wave s
 teepness\, floe size relative to wavelength\, floe-size distribution\, as 
 well as the restitution coefficient and drag between the ocean and the ice
 . For relatively large ice floes\, the results are very sensitive to the f
 ormulation of wave forcing and ice&ndash\;water drag. If the forcing corre
 ctly takes into account floe size relative to the wavelength\, the model a
 ccurately reproduces surge RAOs of single floes\, as well as accelerations
  and forces of floes impacting a structure.
LOCATION:Seminar Room 1\, Newton Institute
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